Leather-cutting machine.



H. KEHLER.

LEATHER CUTTlNG MACHINE. APPLICATION FILED JULY 28. 1913. RENEWED MAR. 22. 1915.

1 1%1 g, Patented June 1, 1915.

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HERBERT KEHLEB, OF WARSAW, INDIANA.

LEATHER-CUTTING MACHINE.

Specification of Letters Patent. i I Patented June 1, 11915.

Application filed July 2a, 1913, Serial No. 781,673. Renewed March 22, 1915. Serial No. ease.

To all whom it may concern:

Be it known that I, HERBERT KEHLER, a citizen of the United States, residing at Warsaw, in the county of Kosciusko and State of Indiana, have invented certain new and useful Improvements in Leather-Cutting Machines; and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in the art to which it appertai'ns to 'make and use the same.

This invention relates to improvements in leather cutting machines and particularly to .rotary cutting machines.

One object of the invention is to provide a leather cutting machine having an improved construction and arrangement of cutters, means for yieldingly holding the same in operative position and means for adjustably supporting one of the cutters with respect to the other cutter.

A further object is to provide a leather cutting machine which will be simple, strong, durable and inexpensive in construetion, efiicient and reliable in operation and well adapted for the purpose for which it is designed.

With these and other objects in view, the invention consists of certain novel features of construction, and the combination and arrangement of parts as will be more fully described and claimed.

In the accompanying drawings: Figure 1 is a side view of my improvedeleather cutting machine; Fig. 2 is a central vertical longitudinal section thereof; Fig. 3 is a ver tical cross section taken on the line 3-3 of Fig. 1 Fig. 4 is a detail horizontal sectlonal view of a portion of the front end of the machine taken on the line 14 of Fig. 3;

Fig. 5 is a detail perspective view of the adjustable bearing for the outer end of the shaft of the upper-cutter.

-My improved leather cutting machine comprises a U-sh'aped supporting frame 1 consisting'of a base member or lower bearing arm 2 and an upper bearing supporting arm 3. The arms 2 and 3 are spaced a suitable distance apart and are held in parallel relation by a plate or end member 4:which is formed integral with the inner ends of the arms as shown. -'Ihe arms 2 and 3 have formed in their inner opposed faces longitudinal grooves or channels 5 which communicate at their inner ends with a channel 6 formed on the inner face of the end mem- 19 the outer end of which is ber 1. On the outer sides of the lower arm or base member 2 of the frame are laterally pro ecting apertured lugs 7 which are adapted to receive screws or other fastening devices by means of which the machine is securely fastened to a bench, table or other support. In the plate or end member 4 immediately above this end of'the base member 2 and in line with the groove 5 therein is a bearing aperture 8. On the upper side of the outer or free. end of the base member 2 an upwardly projecting off-set 9 having therein a bearing passage 10 which is disposed in line with the aperture 8 and in said circular disk of suitable size and has its edge square and preferably milled to enable the same to obtain a firm engagement with the leather as the same is fed to the cutters. The opposite end of the shaft 11 is extended be yond the inner end of the frame and has shdably keyed thereon a spur gear 15. On the extreme end of the shaft and spaced a suitable distance from the gear 15 is secured a crank'handle 16 whereby the shaft ll and gear 15 are revolved.v Arranged on the shaft 11 between the gear 15 and the inner end of the handle 16 is a coiled'spring 17 the object.

of which will be hereinafter described.

. In the end member 4 of the framejmmediately below the inner end of the arm 3 is a tapered bearing opening 18 in which is revolubly mounted a cutter operating shaft revolubly supported in a-bearing sleeve 20. 1 The sleeve 20 is adjustably secured to the outer end of the arm 3 by means of an upwardly projecting'supporting plate 21 which is formed integral with'the sleeve and has in its upperedge two vertically disposed notches 22. The p ate 21 is clamped into engagement with the outer end of the arm 3 by clamping bolts 23 having on their outer ends flanged heads and which are engaged with the notches 22 in the plate 21 and are screwed into threaded sockets 24.. formed on the end of the arm 3'as clearly shown in Fig. 4; of the drawing By thus fastening thebearing sleeve 20 to the end of the arm 3, said sleeve may be readily adjusted to support the outer end of the shaft 19 at the desired position. In order to firmly hold the sleeve 20 in its adjusted positions I provide a stop screw 25 which is engaged with a threaded aperture 26 formed in an off-set flange 27 on the outer end of the arm 3 as shown. After the sleeve 20 hasbeen adjusted to support the outer end of the shaft 19 at the deslred position the stop screw 25 is screwed down into engagement with the upper edge of the plate 21 thus obviating any danger of theshaft being forced upwardly in the operation of cuttingthe leather. While this screw 25 performs the function above stated, it also has the function of aiding in making fine adjustments of the sleeve carrying the one end of the shaft 19. To this end this screw may be said to be an adjusting screw but it, of course, also forms a stop screw to prevent any upward movement of the sleeve in the operation of the device.

The outer end of the shaft 19 projects a short distance beyond the outer end of the sleeve 20 and is reduced to form a shoulder 28. In the-reduced end of the shaft is formed a threaded socket 29. Engaged with the reduced end of the shaft 19 is an upper cutter 30 said cutter being securely clamped on said end of the shaft and against the shoulder 28 by a clamping screw 31 which is engaged with the socket 29 as clearly shown in Fig. 2 of the drawing. The cutter 30 is in the form of a circular disk having a flat outer surface and a beveled or tapered inner surface which forms a sharp cutting edge. When thus arranged the outer surface of the cutter 30 is engaged at its lower edge by the inner surface of the lower cutter 13 said lower cutter being held in close engagement with the outer surface of the cutter 30 by the coiled spring 17 on the inner end of the shaft 11 as will be readily understood" Keyed to the inner end of the shaft 19 is a spur gear 32 which engages the spur gear 15 on the lower shaft 11 and is thereby operated and drives the shaft 19 and upper cutter 30 in the proper direction for coacting with the lower cutter 13 for cutting or splitting the leather applied thereto. The gear 32 is held in position on the end of the shaft 19 by a stop collar 33 which is pinned or otherwise securely fastened to the shaft as shown. It will thus be seen from this construction that upon the rotation of the crank handle 16 the shafts 11 and 19 and correspondingly the cutters 13' and 30 will be rotated in opposite directions and in view of the particular construction of the cutters and the relation of the one to the other, the cutting of the leather is readily and efliciently accomplished.

From the foregoing description, taken in connection with the accompanying drawings, the construction and operatlon of the invention will be readily understood with out requiring a more extended explanation.

Various changes inthe form, proportion and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advanta es of the claimed invention.

' aving thus particularly described the nature of my invention what I claim is z" 1. A leather cutting machine comprising a frame having upper and lower arms thereon, an operating shaft revolubly and slidably mounted in the lower arm of the frame and projecting beyond the ends thereof, a cutter carried on one end of said shaft, a gear slidably keyed on the opposite end thereof, an operating member fixed also on the last mentioned end of said shaft, a coil spring encirclin the shaft between said gear and operating member, an additional shaft mounted for rotation inthe upper arm of said frame and having its ends extending beyond the latter, a gear carried on the last -mentioned shaft engaging the first mentioned gear, an additional cutter carried on I ing shaft revolubly and slidably mounted in said lower arm of the frame, a cutter mounted on one end of said shaft, agear slidably keyed on the opposite end thereof, an operating member fixed on this end of the shaft, a. spring arranged between said gear and operating member, an upper cutter operating shaft having a revoluble engagement at one end .with the upper portion of the frame, a gear keyed to this end of the shaft and engaged with the gear on the lower shaft, an upper shaft supporting sleeve adapted to. revolubly support the outer end of said upper sha means to adjustably secure said sleeve to the upper arm of the. frame, and an upper cutter mounted on said upper shaft and. having an operative engagement with the said lower cutter.

3. In a leather cutting machine, a-v supporting frame comprising lower and upper shaft supporting arms, a lower cutter supporting and operating shaft slidably and revolubly mounted in said lower arm, an operating member engaged with said shaft, an upper cutter supporting and operating shaft revolubly mounted at one end in said upper arm of the frame and geared at this end to the lower cutter operating shaft, a

sleeve adapted to revolubly support the outer end of the upper shaft, a plate arranged on said sleeve having therein notches, clamping screws engaged with said notches and with the outer end of the upper arm of the frame whereby said sleeve is adjustably secured to said arm to support the outer end of the upper shaft in its adjusted positions, a stop screw arranged on the outer end of said upper arm and adapted to engage said plate whereby the sleeve is securely held in its adjusted positions, a cutter secured to the outer end of said upper shaft, a coacting cutter secured to the adjacent end of the lower shaft, and-means to hold said lower cutter in yielding engagement with the upper cutter.

4. In a leather cutting machine, a supporting frame comprising-upper and lower shaft supporting arms spaced apart and integrally connected at one end, said frame having in its inner end a lower shaft hearing aperture and an upper tapered shaft bearing aperture, a bearing on the outer end of said lower arm, a lower cutter operating shaft revolubly and slidably mounted in said bearing and in the lower bearing aperture at the opposite end of the frame, an upper cutter operating shaft revolubly mounted at its inner end in said tapered bearing aperture, a sleeve adjustably secured to the' outer end of the upper arm and adapted to revolubly support the'outer end of said upper shaft, a cutter secured to the outer end of the upper shaft and comprising a disk having a flat outer surface and having its inner surface beveled to form a sharp cutting edge with the outer surface a lower cutter fixed on the outer end of said lower HERBERT KEHLER.

Witnesses:

LORETTA A. WARD, ORAL C. Com. 

